Locomotive boiler-water circulator



April 13 1926. 1,580,686

W. C. SCHULTZ LOCOMOTIVE BOILER WATER CIRCULATOR Filed August 9 1924 2 Sheets-Sheet 1 I I I, 1 G2 elm 0M 'i'iaxsjijz fimcm/Z x w 1 v 0/ Patented Apr. 13, 1926.

UNITED STATES ieATENrorFioE.

WILLIAMYC. SCHULTZ, OF'MILWAUKEE, WISCONSIN; GULNARY SCHULTZ ADMINIS- 'TRATO R OF SAID -WILLIAM C. SCHULTZ, DECEASED.

LO(JOLIVIIO'IIV'E BOILER-WATER' CIRCULATOR.

Application filed August 9, 1924. SeriaI'No. 731,140.

1 '0 all whom it may concern:

Be itknown that I, YVILLIAM O. SCHULTZ, a citizenv of the United States, and resident of Milwaukee, in the countyofy. Milwaukee and State of isconsin, haveinvented certain new and useful Improvements in Locomotive Boilerater Circulators; and I do hereby declare that the following is a full, clear, and exact description thereof.

This invention relates to locomotive boiler water circulatorsw It is well known that steam boilers, particularly of the locomotive. typearesubjected to severe conditions and frequently haveto use relatively impurewater having sediment, organic: matter and other material likely to interfere with the efiicientqoperw tion of the boiler. Further than'this, it is frequently diflicult -to accurately determine the height of the Water in a locomotive boiler due to surging and to an unequal hydrostatic head in the boiler itself dueto the actual steaming of the boilerwhichtends to pile up water adjacent the backhead of the boiler in a relativelysharp crest, so that although thew-ater gauge -may show the normal water level, still'when .the boiler is in active operation, the front-of the crown ,sheetwmay be uncovered. In addition to this,-there is difliculty in securing the quick detaching of the steam bubble from. the

walls of the lire box and asis well known, 7

this is-the practical determining element in the rating of the boiler. 'l hesteam bubbles themselves, when adhering to the steaming surface form: aneiiective insulating sheet and not only promote distortionvand burning of the boiler parts,- but also materially reduce .theeliiciency of the boiler audaits total output. i

This invention-is designed to-overcome the above noteddefects, and objects of such invention are to provide a locomotive boiler water circulator in which a very rapid and effective circulation -or sweeping of .the water over the steaming or radiating-surface is secured, in which the'steam bubbles are rapidly washed or swept from their position adjacent the steaming surfaces, and in whichthe efficiency and output ofthe boiler is materially and substantially increased.

Further objects areto provide a locomotive boiler water cir-culator which prevents surging of the water and building up of a crest of water adjacent the rear portion of the boiler, which maintains arapid circulation and prevents the formation ofsedi ment on. the active portion of. :the boiler, which causes-.a large VOl'HTHG'OfWELiGIi to constantly change its position from the 'front'to the rear of the boiler, and in which the boiler plates are fully guarded against chilling and constantly warping due to the incoming feed water.

Further objects are to, provide :a. locomotive boiler circulator in which the. feed water. is. intimately ,mi-Xed L with a :large volume voftheheatedwater within the-boiler, in which-this mixed wateris further. mixed with the remaining water in the boilertprior to itscontactingwith any of the boiler plates, and inwhich the usual undesirable stresses due to theinjection of; freshwater vinto a boiler are wholly avoided.

Furtherwobjeots are toprovide aoloco motive boiler circulator :which .may be readily applied vto existing types ofelocomotives with a minimunrof work.

An embodiment ofthe invention is shown in the accompanying .drawing, in which Figure 1 is a longitudinal sectional view through a locomotive boiler, such section beingtaken :on the li-ne 1- 1 of Figure .3.

Figure Elisa transverse sectional view on the line 22 of Figure 1,. y

Figure 3 is a rear end view ofzthe boi-ler.

4 Figure 4: is a: fragmentary view of the deliverypipe with the IZGt111'I1"b61it liff01 directing the water: towards the rear of the boiler.

Figure 5 is a fragmentary sectional iview of the delivery i nozzle xlnom the feed water supply and the associated portion of the delivery pipe orcirculating pipe;

l The boiler consists of a drum or casing 1. Theiire box Qris provided with the renal icrown sheet 3 and rearsheet 4t andwith'the arclrtubesb. The-gases'from the firebox are: led outwardly by means offl'ues -on pipes 6 in the usual manner. The firebox back sheet 4 is spaced, in theusual manner from the rear plate. 7 ofthe boiler.

T In accordance with the customary practise in: locomotive boilers injectors are positioned on opposite sides of the boilers, one of such injectors being shown in dotted lines and-beingiindicated .by reference character 8. ater from the injectors is. brought rearward-1y by means of pipes 9 andpasses to aiittinglt) which is essentially a T .-(see Figure This fitting communicates with the branch pipes 11 which lead to the fittings 12 (see Figure 5.) These fittings 12 are provided with flanges 18 by which they may be bolted to the rear plate 7 of the boiler and are further provided with forwardly projecting shoulders or flanges lt adapted to fit a packing member 15. This packing member is seated within a spherically contoured aperture 16 formed in the rear plate 7 of the boiler, and thus forms a ball and socket joint. This fitting 12 carries a hollow plug 17 which in turn carries a check valve 18 to prevent reverse flow, and carries a delivery nozzle 19 which is directed forwardly towards the front of the boiler, as shown in Figure 5. Preferably clean out plugs 20 are provided for each of the fittings 12. The circulating and mixing pipe 21 is positioned within the boiler and has its rear end flared, as indicated at 22 (see Figure 5) and located in proximity to the nozzle 19, such nozzle projecting a slight distance into the pipe. This pipe extends to the forward portion of the-boiler, as shown in Figure 1, and is provided with a curved front end 23 (see Figures 1, 2 and et.)

It is to be noted that a pipe 21 is pro vided on each side of the boiler, and that the curved portions are turned inwardly towards each other and their open ends are directed rearwardly. It is to be distinctly understood that the curved ends or return bends of the pipes may be turned in other directions.

It is not intended that solid streams of water shall ,be projected rearwardly from the open ends of the pipes but that the water shall be directed in sheets of relatively wide extent so as to entrain a large portion of the water in the boiler at the forward end of the boiler and direct it rearwardly. To accomplish this, the curved portions 23 of the pipes have their rear portions cut away, as indicated at 2 1, to provide relatively wide openings, (see Figure 4.)

It will be seen that when the boiler is in active operation and one or both of the injectors are workingthat streams of feed water will be violently projected forwardly,

through the nozzles 19 and will entrain a large quantity of water at the rear portion of the boiler and will project such water forwardly through the circulating or mixing pipes 21. This large volume of water. is discharged at the forward portion of the pipes through their open ends and through the relatively large cut away portions 24, so that the water is started rearwardly and is projected into the water in the boiler in relatively wide sheets.

It will be seen, therefore, that the relatively cooler feed water is mixed with several times its volume of boiler water within the pipe 21 and that this large volume of water in active motion is further mixed at the front end of the boiler with the rest of the water in the boiler.

It will be seen, therefore, that the circulating pipes cause a large displacement of water at the rear end of the boiler and delivers such water at the forward end thus insuring a rapid circulation of water and causing the active sweeping of the steam bubbles from the steaming surface, thus markedly increasing the steaming efficiency of the boiler. Further than this, the formation of sediment upon the surface is prevented by this circulation.

Building up of a crest of water at the rear portion of the boiler when it is in active operation due to the violent steaming of the boiler at this portion is materially modified and lessened as the water is drawn directly from this crest and projected forwardly into the forward portion of the boiler.

Although the invention has been described in considerable detail, it is to be understood that the invention may be variously embodied and is, therefore, to be limited only as claimed.

I claim:

1. A circulator for locomotive boiler water for use with a boiler having a fire box in the rear portion provided with a crown sheet, side walls, and a back sheet, said circulator comprising a feed water nozzle pro jecting into the rear portion of the boiler adjacent the crown sheet, a circulating pipe located within the boiler with its intake end adjacent and aligned with said nozzle, said pipe extending towards the forward end of the boiler and having a delivery portion at such forward end, such delivery portion opening towards the rear of the boiler.

2. A circulator for locomotive boiler water for use with a boiler having a fire box in the rear portion and forwardly extending flues, said circulator comprising a feed water injector nozzle projecting forwardly through the rear portion of the boiler adjacent the upper portion of the fire box, and a circulating pipe located within the boiler and aligned with said nozzle and having a forward delivery end positioned adjacent the upper line of said flues, said delivery end being curved and having the rear portion of the curve cut away to provide a large delivery opening directed towards the rear of the boiler.

3. The combination of a locomotive boiler having a rear fire box and forwardly extending flues, means for forcing feed water into said boiler, a pair of feed water nozzles projecting forwardly through the rear portion of said boiler and located adjacent the upper portion of said fire box, and a pair of laterally spaced circulating pipes aligning with said nozzles and extending towards the front end of said boiler, said pipes each having a curved front portion having its rear side cut away, said curved portions being located adjacent the upper line of said fiues.

4;. A circulato-r for locomotive boiler water for use with a locomotive boiler having a lire box in the rear portion provided with a crown sheet, side walls and a back sheet, said circulator comprising a feed water nozzle projecting into the rear portion of the boiler adjacent the crown sheet, a circulating pipe located within the boiler with its intake end adjacent and aligning with said feed water nozzle, said intake end being-spaced from the rear of the boiler and constituting the sole intake for said circulating pipe, said pipe extending towards the forward end of the boiler and having a delivery portion at such forward end, such delivery portion opening towards the rear of said boiler and being curved throughout its extent with its rear side cut away.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of isconsin.

WILLIAM G. SCHULTZ. 

